Air-governor for musical instruments.



PATRNTRD` A PR. 2, 1NR/. l

J. H; GERNE;v AIR GovRRNoR PoR MUSICAL INSTRUMENTS.

APPLIUATION FILED HAY 3,'1906?.

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110.849,05@ l PATBNTEDAPR. 2,1907. l J. H. muss.

AIR GOVERNOR PoR MUSIGAL'INSTRUMENTS.

A AIFPLIOATION FILED HAY 3,1900.

'- 2 sums-SHEET 2.

@v/Mr- Aactuated by the usual pedals.

UNITED sTATEs PETENT oEEIoE.

JOSEPH HERBERT CHASE, OF BUFFALO, NEW YORK, ASSIGNOR TO THE CHASE t BAKER COMPANY, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

AIR-GOVERNOR FOR MUSIGALINSTFIUMENTS.

Specification' of Letters Patent.

Patented April 2, 1907.

Application filed May 3, 1906. Serial No. 314,941.

New York, have invented a new anduseful l of the latter Improvement in Air-Governors for Musical' Instruments, of Which thefolloWing is aspeci- .fic-ation.

In self-playing musical instruments in which the main bellows is operated by pedals and the music-sheet is propelled by an air or exhaust motor it .is necessary to automatically control the air-currentproduced by the main bellows in order to insure a steady and uniform travel of the music-sheet notwithstanding variations in the bellows-section or air tension. a piece of music to rewind the music-sheet at a comparatively)high speed by allowing the main 'fellows to act upon the motor at lts highest air tension.

It is the object of my invention to produce a reliable air-governor for this purpose Which is simple and compact'in construction and which can be easily applied tothe main bel-v lows. v

In the accompanying drawings, consisting of two sheets, Figure 1 is a vertical section ol" the improved air-governor applied to the reservoir of a suction-bellows, showing the position of the movable parts While regulatf ing the speed of the aire-motor, theplane of thi` section being in line 1 1, Fig?. Fig. 2 is a similar section showing tlpe position of .the parts when the full suction of the bellows acts upon the motor in rewindng the music-sheet. Fig. 2. is a horizontal section in line 3 3, Fig. 1, looking upward. Fig. 4 is a horizontal section in line 4 4, Fig. 5, looking upward. Figs 5, 6, and 7 are vertical sections in the corrospondinglyhnumbered hnes in Fig. 1. Fig, 8 is a side elevation ol' the air-governor. Similar letters of reference indicate corresponding parts throughout the Several views,

-A indicates the main suction-bellows of a pianosplayer or similar musical instrument, and A thearm of its. movable board, Which'is (Not shown.) Azis the stationary air chamber lor reservoir carrying the bellows AV and connected therewith by the usual port a.' l

To the front side oi the -airereservoiris :1p-

'It is also desirable after playing l speed music is played. This valve is 4operated by a 7o f ,i ably elongated and enlarged at vone en d, as 5 shown.

I drawings by a spring i', which tends to plied the improved air-'governor,which con-A sists of a box or Acase containing a lower or outlet chamber B, Which communicates With 55 the air-reservoir by a port b in the rontwall an upper or inlet chamber C, provided at one end with an aperture c, with which is adapted to be connected the apparatus or appliance to be controlled bythe gov- 6o ernor, such as the' air-motor which proples the music-sheet of a piano-player or selfplaying musical instrument, and a Ichamber or connecting-passage D, which communicates with the chambers B4 C front Wall of said chambers.

To the upper port f is applied a sliding throttle-valve g for manually controllin the bf the motor and the tempo at Whic i theI rod 'h or any other suitable means.

The port may be oi' any suitable lshape, but

is'prefer In the construction lshown in the` 1 harder Wood than the body-of the a1r-gov ernor, the front Wall of the chamber C being provided With av comparatively large aperture f 2, which registers with the port f.

lThe port e is controlled by an automaticc regulating-valve i, preferably arranged in the outlet-chamber B, so as to open With or in the direction of the suction-current. This valve is carried by a lever I, suitably fulcrumed Within the chamber open sai d valve.

J indicates a governing bellows or pneumatic having its fixed board secured to the front side of the chamber D, While its -mov -V able board acts through a rod or sticker y' 9o upon the lower arm of the lever I in such manne-r that when said bellows is collapsed it closes the valve i, while Whenit expands it allows the springi to open said valve.

This rod passes through the connecting 95 chamber D.

Asl shown in Fig. 8, the governing-bellows is provided with a suitable expansion-spring' J', which resists the inward or collapsing movement of its movable board. The govroo earning-bellows communicates Withthe connecting-chamber D by an exhaustport 7c and with' the outerV atmosphere by an air or .flushing port Z, asbest shown in Fig. 4.

by ports efin the it is formed in a Wear-plate fJ of B and acted on A tirne airis exh l` lng 4said -bello 'suction increases t tempo-regulating main bell chamb entis 45,

and

crews aslidingsvvitch--I The box or lng-valve 'L an lows J, th

These orts are controlled by valve lill, which is arranged to close the flushing-port'l When the exhaust-port c is opened, 'an vice versa. lThis valve, like the throttle-valve-g, may be o erated manuallybxT a rod m or other sutab e means.

the nstruine it .i at'rest, the governing-bellows is expsn lad, allowing the re lating`valve i to remain Wide open'. Wn the instrument is t( be played, the .throttle-valve gis o ened lmore or less,` according to the desireclltempo, and the switchval've M is shift pen the exhaust-port c and close theA .Z, as shown in Flin perating themain be l is exhausted from th ar)7 exhaust .assa'ge o r chainber tor thro 0h the aperture c, ports f 2, connecti' -chamber D, vention. outlet-chamber B; ariiport b. At the sainev I 01mm as In austed from the governin -bel-v air-(govern gh the' portc, therebv colapsing Ainlet an outle Ws more or' less, accor ding'to the trollingt resistance ofits spring J and the suction or air .tension produced by the main bellows causing the. rgulatin closed to a corresponding-.Je

applied o r replaced. By arranging `vthe 'reg tingfvalve vt`o close against the W' y when reula 1nd leased, avoiding th valve which Pivo now'o 8o others may obviously be parting from the scope and y im'vention` or; co

lows J throu 95 bellows and valve. perly4 tenslomn egree ol' suction opened, substantially as set forth. 1g the ,spring J any air-governor, eo

ess than that ofthe y be obtained in the onnec'ted therewi h. desired to operate the motor at gh s eed for quickly rewinding the music-- e throttle-valve gis fully -opened and t e switch-valve M is revers ed to close th -port 7c an( open the lushingl Th1. ellows J fr sheet, t dcommunicating s entirely cuts o om th 'ng said chambers, a vreguating-valve controllin the passage 'of 'the ainrm .said connect g-chamber toA said outlet-chamber, a

trolling said valve ing' or cutting sa; neumatle' at w1 Leubstantia sset fo 5. An "airovernor com risng'umisefheving inletandg'outletchamhers, 'n' chamber 'on 'Passage connecting said. cham ers, .n reg'uating-valve controlling tho passage of the 13o from air, the switch-valve M To revent lo ma e of such length that the exhaust-port u'shng-#port 'Z is is 7c is'u y closed before the fl d thatfn this inproved rrent, `Whether conconstruction vthe passes throu h one and the sume opened aircu trolledforurnformly ropellin -the music# thesheet,

port e, thus 'simplifying the construction' of yIt will 1be observe unrestricted r quicky-revvnl the device.

, said connecting-chamber by an exhaust-port valve, and a throttle-va air from said connecting-chamber to said outlet-chamber, a governlng-pneumatic controlling said valve 'and communicating with and with the atmosphere by a flushing-port,

'and a switch-valve operating to close said liushing-port when said exhaust-port is opened, and vice versa, substantially as set forth. i

6. An air-governor comprising a case having inlet andoutlet chambers, a chamber or passage connecting said chambers, -a regulating-valre controlling the passage of the air from said connecting-chamber to said outlet-ch anberl a governing-pneumatic normally communicating `Jvith said connectingchambe': and controllin said regulatingive controlling the passage of the air from said inlet-chambervto said connecting-chamber, substantially' as set forth.

7. An air-governor, comprising a case having inlet and outlet chambers, a chamber or communication between said pneumatic and said connecting-chamber, substantially as set forth.

8. An air-governor, com rising a case having inlet and outlet chamlgers anda port or passage connecting the same, a regulatingvalve applied to sald port and opening in the direction of the air-current through the same, and a governing-pneumatic normally communicating with said chambers andcontrolling said valve, substantially as set forth.

9. An air-governor comprising a case having inlet and outletchambers, a chamber or passage connecting the same, a lever arranged in said outlet-chamber, a valve car.-

ried by said lever andcontrolling the port between the outlet-chamber and the connecting chamber` a governingpneumatic normally 'communicating Wlth said connectmgconnecting-chamber, substantially'- as set.

forth.

Witness my hand this 28th day of April,

l JOSEPH HERBERT CHASE.

Witnesses: 5

C. F. GEYER, W. E. BUNDY. 

